1. Equals GDP measured as the sum of expenditures less
gross domestic incomethat is, GDP measured as the costs incurred and
profits earned in domestic production.

NOTE. In this table, revised estimates for 1987 and
previously published estimates for 1987 and 1989 are based on the 1972 Standard
Industrial Classification (SIC); revised estimates for 1989 are based on the
1987 SIC. Revisions are not shown for those industries with 1987 and 1972 SIC
definitions that are significantly different.